Miter-box.



N. J. SHIMMEL- 1mm Box.

PPLIATION FILED MAR. 24, 1906. I 91 4, 1 96 Patented Mar. 2, 1909.

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` N. J. SHIMMEL.

MITER BOX.

APPLIUATION FILED MAR. 24, 190e.

NEWTON J. SHIMMEL, OF SUMMERVILLE, PENNSYLVANIA.

MITER-BOX.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed March 24, 1906. Serial No. 307,808.

To all whom it may concern:

Be it known that I, NEWTON J. SHIMMEL,

citizen of the United States of America, re-` .i rable, comparativelyinexpensive to manufacture and highly eflicient for the purposes forwhich it is used.

Another obj ect of this invention is to provide a miter box that can beconveniently carried by workmen, and may be easily attached to anordinary wooden miter box, commonly used by carpenters, and made fromrefuse or waste product usually found where a' piece of work is beingperformed.

A further object of this invention is to provide a miter box having asingle slot or kerf in which a saw moves, the box being constructed sothat the saw can be easily and quickly shifted from one position toanother without releasing the saw, thereby preventing the saw fromsliding through the cut or kerf and contacting with the material beingoperated upon.

A still further object of this invention is to provide a miter box whichcan be easily and quickly disassembled, thus permitting a workman tosnugly pack the same in a tool chest.

With the above and other objects in view, which will more readily appearas the nature of the invention is better understood, the same consistsin the novel construction, cornbination, and arrangement of parts to behereinafter more fully described and then specifically pointed out inthe claims, and referring to the drawing accompanying this application,like numerals of reference designate corresponding parts throughout theseveral views, in which Figure 1 is a side elevation of my improvedmiter box, Fig. 2 is a front elevation. Fig. 3 is a plan view. Fig. 4 isa section on the line 4-4 of Fig. 1. Fig. 5 is a detail view of the locklever. Fig. 6 is a perspective view of the sector device. Fig. 7 is aperspective view of the bearing plate. Fig. 8 is a perspective view ofthe swinging arm. Fig.v 9 is a perspective view of the locking nut. Fig.10 is a detached view of one of the bell crank levers of the lock lever.

To put my invention into practice, l construct my improved miter box ofstrong and durable metal, and of a plurality of parts which can beeasily and quickly assembled. The miter box is adapted to be used inconnection with a frame embodying a horizontal base-board 2 and avertical board 3 which is secured to the board 2 at right anglesthereto. rlhe vertical board 3 is provided with a wedge shaped slot orkerf 4, through which the blade of a saw is adapted to pass. Upon theupper edge of the board 3 directly over the slot or kerf 4 is mounted abearing plate 7, said bearing plate having two depending standards 8, 8which support said plate over the baseboard 2 in alinenient with theslot or kerf 4. The bearing plate is substantially semi-circular inplan, and is provided with a central opening 9 and with upwardlyextending pins 10, at its edges. Revolubly connected to the bearingplate 7 by a bolt or pin 11, and resting thereon, is a sector 12, saidsector being slightly larger than the bearing plates 7 and provided withsegmentshaped slots 14, 14 to receive the pins 10, 10, and with notches15, 15 and 16, said notches being formed in the edge of the sector andbeing forty-live degrees apart. The plate 7 is also preferably providedwith corresponding notches as shown. A swinging arm is also mounted uponthe bearing plate 7, said arm consisting of a cylindrical ortion 18having a rearwardly extending `ldracketed arm 19 which engages the pinor bolt 11 and permits of the arm being swung around the bearing plate7. The arm 19 is provided with an upwardly extending lug 20 adapted tooverlie the sector 12 and be held in engagement therewith by set screws21, 21. The lug 2O is provided with a vertically disposed slot 22adapted to register with the slots 15, 15 and 16 of the sector 12 andplate 7. By this arrangement of the parts 7-12 with the slots 14 in themember i 12 and the pins 10 extending through the slots from the plate7, the saw may be readily adjusted to any required extent other than bythe slots 15-16, as will be obvious. The slots 14 will be long enough toenable ll O the member 12 to be adjusted upon the member 7 to an extentequal to one-half the distance between the notches, so that the plate 7may be adjusted to enable the saw to be placed at any desired anglerelative to the material being operated on. The notches 15-16 aredesigned to enable the operator to set the device readily and withoutcalculation where usual miters aie required, `but if a more delicateadjustment, or a diiierent angle is required then the pins 10 are loosened and the plate 12 adjusted as above described. The swinging armcarrying the guide device is likewise adjustable with the other parts aswill be obvious. ln formi-ng the cylindrical portion 18 of the swingingarm, l provide said portion with wedge shaped grooves 23, 23, while oneedge of said portion is cut and sheared as at 24 and bent outwardly toform a lip 25. The lip 25 is provided with an opening 26 to accommodatea locking nut 27, the object of which will be presently described. lnconnection with the swinging arm l employ a semicylindrical saw guide28, the edges of said guide being flanged as at 29, 29, and beveled, asat 30, 30 to engage in the grooves 23, 23 oi the cylindrical portion 18of the swinging arm. Secured to the lower end of the semicylindrical sawguide 28 is a cleat 31, said cleat being secured to the saw guide by ascrew 32. The cleat supports a guide plate 33 for the saw blade 5.

Held a short distance away from the saw guide 28 by spacer blocks 34 isa similar saw guide 35, with the exception that the grooves 23, 23 andthe lip 25 are dispensed with, the lower end of the guide 35 carrying aplate 36 similar to the plate 33. rlhe spacer block 34 is connectedbetween the members 28 and 37 at their extreme upper ends as shown, sothat the lower ends of the parts are tree to be moved toward and awayfrom each other lto a limited extent. A thumb screw 37 passes throughthe guide 35 and engages the guide 28, substantially midway of themembers whereby the lower end of the guides .may be brought intoengagement with the saw blade, allowing a carpenter to temporarily clampthe saw, and thus prevent the same falling or striking the materialbeing operated upon in the miter box while the parts are being shifted,it of course being understood that the thumb screw 37 is slackened whenthe saw is again to be operated between the guides 28 and 35.

vReference will now be had to the locking and shifting device of myimproved miter box. Pivotally connected to the guide 28 by rivets orscrews 38, 38 are two bell crank levers 39, 39. A bar 40 is secured tothe bell crank levers 39, 39, as at 41, 41, said bar carrying anoutwardly extending arm 42.

vAnother bar 43 is connected to the bell crank levers, as at 44, 44. Thebar 43 has lits upper end contracted, `as at 45, and extends through aguide way 46 carried by the upy ermost spacing block 34. The spacingbloc r is also provided with a slotted bracket 47, through which thecontracted end 45 of the bar 43 extends, and is held in swingingengagement therewith by a pin 48. The bar 43k serves as a means forretaining the lock arm 40 in its Josition parallel to the saw guidingmembers, as will be obvious. Connected to the arm 42 by a pin 49 is aslotted shifting lever 50 the lower end of said lever carrying a pin 51and a grip 52, while the upper end oi the lever is provided with aplurality ot equally spaced openings 53 by which the upper end of theshifting lever is locked iin. engagement with the bracket 47 by a pin54.

The saws to be used in connection with my improved miter box have theupper edges of their blades 5 notched, as at 55 to engage the vpin 51carried by the lower end of the shifting lever 50. l

The rear edoe of the bar 40 is adapted to engage the verticallyAdisposed slot 22 ol the lug 20 and in one of the notches 15, 15 and 16ot the sector. The bar is adapted to hold the swinging arm in a 'fixedposition, as long as said bar engages in the slot 22 and one ot thenotches 15, 15 or 16 ot the sector 12, but when the bar is drawn out ofengagement with one of the notches by moving said shitting leveroutwardly, the swinging arm may be swung at an angle toits originalposition, at which time the bar 4() will lock in one of the notches 15,15 and iirmly hold the swinging arm in a stationary position.

ln the operation ci unlocking the swinging' arm, whereby the saw may beswung, the operator either pulls the saw rearwardly which through themedium of the pin 51 and the notch 55 swings the shitting leverrearwardly, or the operator grasps the grip 52 and swings the shiftinglever rearwardly thus moving the bar 40 and unlocking the swinging arm17 The shifting lever 50 can be adjusted in the slotted bracket 47 byremoving the pin54 and replacing it in another one of the openings 53 ofthe shifting lever, the slot oi said shitting lever permitting of itsadjustment. This adjustment of the shifting lever is necessary in orderthat saw blades oi various sizes can be readily used in my improvedmiter box. f

The vertically disposed slot 22 of the lug 20 oi the swinging arm is ola greater depth than the notches 15, 15 and 16 of the sector, wherebythe bar 40 will only partially recede and will not become entirelydisengaged from the lug 20 of the swinging arm. v

The form of slot vor keri of the board 1, )ermits of the saw blade 5being swung at any desired angle, and l do not care to .con- 'linemyseli to the notches 15, 15 and 16 as shown, as the sector may bereadily rovided with a great lmany notches, whereby a cut .retaining itin a fixed position relative to may be made with a saw at any anglerelative to the board l.

The locking bolt 27 is adapted to engage i one of the flanged edges 29of the saw guide, I hold said guide in a iixed position, but l the nutwhich is eccentrically mounted upon the lip 25 can be rotated out ofengagement with the saw guide, to permit of the guide being raised andlowered within the cylindrical portion 1S of the swinging arm.

Such changes as are permissible by the appended claims may be resortedto without departing from the spirit and scope of the invention.

llhat l claim and desire to secure by Letters Fatent, is

l. In a miter box, in combination, a bearing plate, a notched memberconnected to and angularly adjustable upon said bearing plate, aswinging arm pivoted to said plate and member, vertically adjustable sawguides connected to said swinging arm, confronting olates carried by thelower ends of said gui es, and means carried by the saw guides andengaging said swinging arm for said bearing plate.

ln a miter box, in combination, a bearing plate, a notched memberconnected to and angularly adjustable upon said bearing plate, aswinging arm pivoted to said plate and nember, vertically adjustable sawguides connected to said swinging arm, confronting plates carried by thelower ends of said saw guides, a lever mechanism carried by the sawguides, a latch connected with the lever mechanism and adapted to beshifted thereby to engage in said member whereby said swinging arm ismaintained in a lined position relative to said bearing plate, and meanscarried by said saw guides for l shifting the latch and actuating thelever mechanism.

3. A miter box comprising vertically disposed saw guides, plates carriedby the lower ends of said guides and adapted to engage the saw blade, anotched member arranged in operative relation with respect to the sawguides, means for pivotally connecting said saw guides with said notchedmember, and means carried between the saw guides above the saw blade andengaging said member for maintaining the guides in the position to whichthey have been adjusted.

4, ln a miter boX in combination, a bearing plate, a notched memberconnected to and angularly adjustable upon said bearing plate, anadjustable swinging arm pivoted to said plate and member, verticallyadjustable saw guides connected to said swinging arm, confronting platescarried by the lower ends of said guides, a pair of bell cranks carriedby one of the saw guides, a link for connecting one of the arms of onebell crank to an arm of the other bell crank, a latch member connectedto the other arms of the bell cranks, said latch member adapted toengage in said notched plate for maintaining said swinging arm in afixed position relative to said bearing plate, and actuating means forsaid latch member and bell crank, said actuating means provided with afinger hole and further having means adapted to be engaged by a sawwhereby said actuating means can be operated.

ln testimony whereof I affix my signature in the presence of twowitnesses.

NEWTON J. SHIMMEL.

Witnesses:

Vieron JOHNSON, JNO. R. SPEER.

